Core Data: What, Why, and How

Abstract

Core Data is a framework and set of tools that allow you to save (or persist) your application’s data to an iOS device’s file system automatically. Core Data is an implementation of something called object-relational mapping (ORM). This is just a fancy way of saying that Core Data allows you to interact with your Objective-C objects without having to worry about how the data from those objects is stored and retrieved from persistent data stores such as relational database (such as SQLite) or into a flat file.